Uses Of Pigments

The uses for which the pigments above mentioned are suitable may be classified as follows - 4

(a). More or less transparent, and fit for graining and finishing. - Blacks (except mineral black and Indian ink), umbers, chrome greens, cadmium yellow, raw and burnt sienna, ochre, French ultramarine, mars orange, bistre and the bituminous browns, sepia.

(6). Little if at all affected by heat or fire. - Whites, ochres, or natural clays.

(c). Fit for fresco or distemper work. - Whites from sulphate of baryta or carbonate or sulphate of lime, all the ochres, the reds, blues, browns, and blacks. (d). Injured by damp and impure air, especially sulphuretted hydrogen, unfit to use in distemper. - White lead, all the yellows except the ochres, red lead, Chinese and Persian lead, Prussian and cobalt blues, orange salts of lead, and all greens.

(e). Fade in strong lights. - All vegetable colours more or less - including the yellows - Prussian blue, indigo, the peaty browns, and in less degrees the madders.5

1 Davidson. 2 Dent.

3 The Paperhanger's, Painter's, and Decorator's Assistant.

4 Modified from a table in Seddon's Builder's Work. 5 Ure.